He’s the grand duke in the castle as you’re one of the princess’s servants. The princess was pretty mean to you because she knew how close you were with Rin.

Today, again you were being treated poorly by the princess and Rin had always knew but he couldn’t fight against the princess. Instead he just took care of you a bit before the princess called him to do nasty things to fulfill the princess’s pleasures

“Are you sure you’ll be okay?” he asked worried